the vatican is considering moving up the date to choose a successor for pope benedict xvi. the conclave could start before march 14th if all the cardinals are already in rome. 117 cardinal electoring will choose the new pope after benedict retires on february 28th. >>> a nurse is suing a michigan hospital for allegedly agreeing to a man's request that african-americans not care for his baby. the lawsuit says managers at the hurley medical center reassigned the african-american nurse after the father made the request. the hospital has not responded to cnn's request for a comment. >>> wall mar's stock took a nosedive on friday after an internal e-mail published by bloomberg news quoted an executive saying february sales were a, quote, total disaster. the stock for the world's largest retailer plummeted shortly after that before making a slight recovery. walmart reports its fourth-quarter earnings next week. later this afternoon, join me for all the latest news, plus we'll take fashion week to the next level with high-tech clothing. dr. sanjay gupta will give us his diagnosis